<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>

<body>
    <script>


        // 值类型
        // 赋值 将等号 右边的值复制一份给等号左边
        var num = 18;
        var num1 = num;
        console.log(num, num1);//18,18

        num = 20;
        console.log(num, num1);//18,20

        // 引用类型
        // 赋值 将等号 右边的值复制一份给等号左边
        var obj = {
            name: '老曾',
            age: 18
        }
        var obj2 = obj;
        console.log(obj.age, obj2.age);//18 ,18

        obj2.age = 20;
        console.log(obj.age, obj2.age);//20，20



        //作业
        var fn1 = function () {
            console.log('fn1打印结果');
        }

        var fn2 = fn1;
        fn2();

         /*
    赋值操作(=):把当前变量存储的值复制一份给接收的变量

    值类型的赋值:把当前变量存储的值(具体的数据)复制一份给接收的变量 
    
    引用类型的赋值:把当前变量存储的值(具体数据的引用即地址)复制一份给接收的变量
    */ 








    </script>
</body>

</html>